W3 Total Cache is hands down one of the best open-source WordPress caching plugins that offers an out-of-the-box and advanced caching mechanism. While it’s packed with features, it’s also slightly complicated, especially for users who lack technical skills.
The plugin is compatible with most hosting plans, including shared, dedicated, and VPS server hosting. Since it’s free, you can use all of its features after installing the plugin—no upsells for you to worry about.
It can improve your server performance by caching every aspect of your site and integrating with several content delivery networks.
What’s more, this cache plugin works for both mobile and desktop versions of your website. I‘d recommend W3 Total Cache for WordPress ecommerce sites as it has tons of features that make it useful for sites with SSL certificates—something that most ecommerce sites have.